Brian Jones, 27 Years Old
This founding member of The Rolling Stones even gave the band their name but was soon forced out of the group by Keith Richards and Mick Jagger due to creative differences. Though Jones and Richards developed The Stones' signature back-and-forth guitar style, Jones still didn't stand a chance at keeping his place in the lineup. Jones died at 27 years old after he was found dead in his swimming pool a month after he left the band.